Any city having in its employ ten or more employees who are members of the system may elect to contribute, in lieu of its contributions set forth in item (a) above, an amount estimated actuarially necessary to match at retirement the accumulated normal contributions of those of its members who will ultimately retire for service or disability; provided that such election shall be made by resolution or ordinance of the legislative body of such city and, in order to become effective for the remainder of the year 1953, shall be made on or before July 1, 1953, and thereafter any election so made shall be made prior to January 1, 1954, to become then effective or prior to January 1st of any succeeding year to become effective on January 1st of such succeeding year.
Any city may, with the approval of the board, further elect to contribute in lieu of its contributions set forth in items (b) and (c) above, an amount estimated actuarially, necessary to amortize over a period of not to exceed thirty years, all liabilities on account of the participation of such a city, which are not covered by the contributions of its employees, its funds on hand and its contributions provided for in item (a) above or the contributions elected to be made in lieu thereof in cases where such city shall have elected to make said contribution in lieu of the contributions required in said item (a); provided that such election shall be made by resolution or ordinance of the legislative body of such city and, in order to become effective for the remainder of the year 1953, shall be made on or before July 1, 1953, and thereafter any election so made shall be made prior to January 1, 1954, to become then effective or prior to January 1st of any succeeding year to become effective on January 1st of such succeeding year.
In the event that any city shall be making either of the lieu contributions as hereinabove set forth, the resulting contributions shall be adjusted to conform with facts and conditions disclosed by each succeeding actuarial valuation.
RCW 41.44.090